A gunsmith built an STI for me but I'm having a "small" problem. The gun will fire without having to press the Beavertail. I was cleaning the gun and when I did couple "safety" checks I was able to dry fire the gun without having to press the beavertail. I will be taking the gun back to the gunsmith, but I would like to know what could cause the gun to react/malfunction that way. I want to know as much as possible so he does not try to feed me some bogus explanation. He is going to fix it as the gun does not have more than 50-75 rounds thru it. Any information will be appreciated.